comedi: pcl726: Prevent invalid irq number

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39685
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-05 18:15:45 UTC
Updated2026-05-12 13:17:04 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: comedi: pcl726: Prevent invalid irq number The reproducer passed in an irq number(0x80008000) that was too large, which triggered the oob. Added an interrupt number check to prevent users from passing in an irq number that was too large. If `it->options[1]` is 31, then `1 << it->options[1]` is still invalid because it shifts a 1-bit into the sign bit (which is UB in C). Possible solutions include reducing the upper bound on the `it->options[1]` value to 30 or lower, or using `1U << it->options[1]`. The old code would just not attempt to request the IRQ if the `options[1]` value were invalid. And it would still configure the device without interrupts even if the call to `request_irq` returned an error. So it would be better to combine this test with the test below.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b bab220b0bb5af652007e278e8e8357f952b0e1ea git Not specified
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b 5a33d07c94ba91306093e823112a7aa9727549f6 git Not specified
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b 0eb4ed2aa261dee228f1668dbfa6d87353e8162d git Not specified
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6 git Not specified
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b d8992c9a01f81128f36acb7c5755530e21fcd059 git Not specified
CNA Linux Linux affected fff46207245cd9e39c05b638afaee2478e64914b 96cb948408b3adb69df7e451ba7da9d21f814d00 git Not specified
CNA Linux Linux affected 3.13 Not specified
CNA Linux Linux unaffected 3.13 semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.149 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.103 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.44 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.4 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/96cb948408b3adb69df7e451ba7da9d21f814d00 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5a33d07c94ba91306093e823112a7aa9727549f6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a3cfcd0c78c80ca7cd80372dc28f77d01be57bf6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bab220b0bb5af652007e278e8e8357f952b0e1ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/d8992c9a01f81128f36acb7c5755530e21fcd059 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0eb4ed2aa261dee228f1668dbfa6d87353e8162d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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